Very interesting topic. I used to have a 458 Lott on a Ruger RSM. It was a nice rifle and quite heavy with scope and mounts. It recoiled noticeably harder than my 470 NE Merkel. I suspect a fair bit of that is to do with stock design and the recoil velocity. The Lott was doing over 2200 fps with my loads- not hot by any stretch but still a fair bit of thump at both ends. I don't notice it anywhere near as much with the double. Cheers